一种用于FTPVS数据处理的非平稳度定义  

A methodology of non-stationary degree suitable for FTPVS data processing

作　　者：谭博[1] 郑华[1] 裴承鸣[1] 

机构地区：[1]西北工业大学动力与能源学院,陕西西安710072

出　　处：《飞行力学》2015年第6期560-564,共5页Flight Dynamics

基　　金：国家自然科学基金资助(11302175)

摘　　要：为解决非平稳程度量化问题及优化非平稳信号处理方法的精度,针对试验数据特点,提出了一种基于时频分析的非平稳度定义方法,使得处理方法的各项参数能够随非平稳度变化进行实时调整,从而提高数据处理结果的精度。通过仿真试验,对非平稳度定义的合理性和实用性进行了研究,并通过风洞试验及飞行试验的数据处理证实了其工程实用性及对非平稳数据处理方法精度的影响。试验结果表明,所提出的非平稳度不仅可以可信地表征信号非平稳程度,而且还可以辅助提高FTPVS数据处理结果的精度。Aiming at qualifying of non-stationary and better analysis results,a methodology of non-stationary degree based on time-frequency analysis is proposed in this paper according to the characteristics of actual collected data,which makes it possible to modify the related parameters of processing method according to non-stationary degree. Non-stationary degree proposed in this paper is tested through both simulation data and actual experimental data. The results show the non-stationary degree in this paper could credibly indicate the non-stationary degree and could be used to improve the accuracy of processing methods for FTPVS.

关 键 词：非平稳度 替代数据 FTPVS 

分 类 号：V215.34[航空宇航科学与技术—航空宇航推进理论与工程]